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Add the convert functions to the source pads of the video4linux and video4linux2 source plugins

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Original commit message from CVS:
Add the convert functions to the source pads of the video4linux and video4linux2 source plugins
This commit is contained in:
Ronald S. Bultje 2002-09-16 21:01:42 +00:00
parent 58f484799d
commit cd4572dbed
2 changed files with 130 additions and 0 deletions
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65
sys/v4l/gstv4lmjpegsrc.c
View file

@ -57,6 +57,11 @@ static void gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass *
static void gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc);
/* pad/buffer functions */
static gboolean gst_v4lmjpegsrc_srcconvert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value);
static GstPadConnectReturn gst_v4lmjpegsrc_srcconnect (GstPad *pad,
GstCaps *caps);
static GstBuffer* gst_v4lmjpegsrc_get (GstPad *pad);
@ -182,6 +187,7 @@ gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc)
gst_pad_set_get_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_get);
gst_pad_set_connect_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_srcconnect);
gst_pad_set_convert_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_srcconvert);
v4lmjpegsrc->bufferpool = gst_buffer_pool_new(
NULL,
@ -209,6 +215,65 @@ gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc)
}
static gboolean
gst_v4lmjpegsrc_srcconvert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value)
{
GstV4lMjpegSrc *v4lmjpegsrc;
gint norm;
gdouble fps;
v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
if (!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsrc)))
return FALSE;
if (!gst_v4l_get_chan_norm(GST_V4LELEMENT(v4lmjpegsrc), NULL, &norm))
return FALSE;
if (norm == VIDEO_MODE_NTSC)
fps = 30000/1001;
else
fps = 25.;
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_UNITS;
/* fall-through */
case GST_FORMAT_UNITS:
*dest_value = src_value * fps / GST_SECOND;
break;
default:
return FALSE;
}
break;
case GST_FORMAT_UNITS:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
/* fall-through */
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / fps;
break;
default:
return FALSE;
}
break;
default:
return FALSE;
}
return TRUE;
}
static GstPadConnectReturn
gst_v4lmjpegsrc_srcconnect (GstPad *pad,
GstCaps *caps)

65
sys/v4l/gstv4lsrc.c
View file

@ -54,6 +54,11 @@ static void gst_v4lsrc_class_init (GstV4lSrcClass *klass);
static void gst_v4lsrc_init (GstV4lSrc *v4lsrc);
/* pad/buffer functions */
static gboolean gst_v4lsrc_srcconvert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value);
static GstPadConnectReturn gst_v4lsrc_srcconnect (GstPad *pad,
GstCaps *caps);
static GstBuffer* gst_v4lsrc_get (GstPad *pad);
@ -160,6 +165,7 @@ gst_v4lsrc_init (GstV4lSrc *v4lsrc)
gst_pad_set_get_function (v4lsrc->srcpad, gst_v4lsrc_get);
gst_pad_set_connect_function (v4lsrc->srcpad, gst_v4lsrc_srcconnect);
gst_pad_set_convert_function (v4lsrc->srcpad, gst_v4lsrc_srcconvert);
v4lsrc->bufferpool = gst_buffer_pool_new(
NULL,
@ -176,6 +182,65 @@ gst_v4lsrc_init (GstV4lSrc *v4lsrc)
}
static gboolean
gst_v4lsrc_srcconvert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value)
{
GstV4lSrc *v4lsrc;
gint norm;
gdouble fps;
v4lsrc = GST_V4LSRC (gst_pad_get_parent (pad));
if (!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lsrc)))
return FALSE;
if (!gst_v4l_get_chan_norm(GST_V4LELEMENT(v4lsrc), NULL, &norm))
return FALSE;
if (norm == VIDEO_MODE_NTSC)
fps = 30000/1001;
else
fps = 25.;
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_UNITS;
/* fall-through */
case GST_FORMAT_UNITS:
*dest_value = src_value * fps / GST_SECOND;
break;
default:
return FALSE;
}
break;
case GST_FORMAT_UNITS:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
/* fall-through */
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / fps;
break;
default:
return FALSE;
}
break;
default:
return FALSE;
}
return TRUE;
}
static GstPadConnectReturn
gst_v4lsrc_srcconnect (GstPad *pad,
GstCaps *vscapslist)